However, because oral medications must pass through the digestive system, to have the same efficacy as IV medications oral antibiotics must have high âbioavailabilityâ â the percentage of the drug that reaches the blood. Drugs administered via PICC lines have, by definition, 100 percent bioavailability.
A: Bactrim is a type of antibiotic used to treat a range of bacterial infections in the body according to WebMD. Physicians prescribe Bactrim to treat certain types of sexually transmitted diseases, urinary tract infections, respiratory illnesses, and various other infections.
Trimethoprim/sulfamethoxazole (Bactrim or Septra) is an older antibiotic that is most commonly used to treat urinary tract infections, except when resistance might be a problem. It is also being used more often now to treat methicillin-resistant staph aureus infections (MRSA).